tests: test on GitHub Actions

.github/workflows/test.yml

@@ -0,0 +1,51 @@
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron: '0 0 * * 6'
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: golangci-lint on .
+        uses: golangci/golangci-lint-action@v1
+        with:
+          version: v1.27
+          args: -E gofmt
+      - name: golangci-lint on fixtures/basic
+        uses: golangci/golangci-lint-action@v1
+        with:
+          version: v1.27
+          working-directory: fixtures/basic
+          args: -E gofmt
+      - name: golangci-lint on fixtures/detect_tty
+        uses: golangci/golangci-lint-action@v1
+        with:
+          version: v1.27
+          working-directory: fixtures/detect_tty
+          args: -E gofmt
+      - name: golangci-lint on fixtures/signals
+        uses: golangci/golangci-lint-action@v1
+        with:
+          version: v1.27
+          working-directory: fixtures/signals
+          args: -E gofmt
+      - name: golangci-lint on fixtures/timed
+        uses: golangci/golangci-lint-action@v1
+        with:
+          version: v1.27
+          working-directory: fixtures/timed
+          args: -E gofmt
+
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ^1.14
+      - name: Test
+        run: |
+          make test

README.md

@@ -1,5 +1,10 @@
 <h1 align="center"><img src="assets/logo.svg" height="50" alt="ets" /></h1>
 
+<p align="center">
+  <a href="https://github.com/zmwangx/ets/releases"><img src="https://img.shields.io/github/v/release/zmwangx/ets" alt="GitHub release" /></a>
+  <a href="https://github.com/zmwangx/ets/actions"><img src="https://github.com/zmwangx/ets/workflows/test/badge.svg?branch=master" alt="Build status" /></a>
+</p>
+
 <p align="center"><img src="assets/animation.svg" alt="ets" /></p>
 
 `ets` is a command output timestamper — it prefixes each line of a command's output with a timestamp.